SYSTEM INCLUDING SENSING ELEMENTS AT DIFFERENT DISTANCES FROM VERTICAL MAGNETIC FIELD LINES
First Claim
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1. A system comprising:
- a magnet configured to provide a magnetic field;
a first magneto-resistive sensing element situated in the magnetic field; and
a second magneto-resistive sensing element situated in the magnetic field, wherein the second magneto-resistive sensing element is laterally a greater distance from vertical magnetic field lines of the magnetic field than the first magneto-resistive sensing element.
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Abstract
A system including a magnet, a first magneto-resistive sensing element, and a second magneto-resistive sensing element. The magnet is configured to provide a magnetic field. The first magneto-resistive sensing element is situated in the magnetic field and the second magneto-resistive sensing element is situated in the magnetic field. The second magneto-resistive sensing element is laterally a greater distance from vertical magnetic field lines of the magnetic field than the first magneto-resistive sensing element.
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Citations
25 Claims
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1. A system comprising:
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a magnet configured to provide a magnetic field; a first magneto-resistive sensing element situated in the magnetic field; and a second magneto-resistive sensing element situated in the magnetic field, wherein the second magneto-resistive sensing element is laterally a greater distance from vertical magnetic field lines of the magnetic field than the first magneto-resistive sensing element. - View Dependent Claims (2, 3, 4)
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5. A system comprising:
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a magnet configured to provide a magnetic field; a first magneto-resistive sensing element situated in the magnetic field; and a second magneto-resistive sensing element situated in the magnetic field, wherein the first magneto-resistive sensing element and the second magneto-resistive sensing element are configured to be differently saturated, such that the second magneto-resistive sensing element is closer to saturation than the first magneto-resistive sensing element. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A system comprising:
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a magnet; and a sensor bridge including; first magneto-resistive sensing elements and second magneto-resistive sensing elements adjacent the magnet; third magneto-resistive sensing elements and fourth magneto-resistive sensing elements laterally offset from vertical magnetic field lines of the magnet a greater distance than the first magneto-resistive sensing elements and the second magneto-resistive sensing elements; and at least one switch configured to select which of the first, the second, the third, and the fourth magneto-resistive sensing elements are in a first resistor divide network and a second resistor divide network to substantially eliminate an offset voltage. - View Dependent Claims (15, 16, 17, 18)
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19. A method of sensing comprising:
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providing a magnetic field; providing an unsaturated magneto-resistive sensing element via the magnetic field; providing a magneto-resistive sensing element that is closer to saturation than the unsaturated magneto-resistive sensing element via the magnetic field; and responding to changes in the magnetic field via the unsaturated magneto-resistive sensing element. - View Dependent Claims (20, 21, 22)
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23. A method of sensing comprising:
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providing a magnetic field via a permanent magnet; and sensing via a sensor bridge in the magnetic field, wherein sensing comprises; providing vertical magnetic field lines to first magneto-resistive sensing elements and second magneto-resistive sensing elements; providing diverging magnetic field lines to third magneto-resistive sensing elements and fourth magneto-resistive sensing elements; and selecting which of the first, the second, the third, and the fourth magneto-resistive sensing elements are in a first resistor divide network and a second resistor divide network to substantially eliminate an offset voltage. - View Dependent Claims (24, 25)
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Specification